#include<iostream>
using namespace std;
class person{
public:
	void setage(unsigned n);
	unsigned getage()const;
private:
	unsigned age;
	};
void person::setage(unsigned n){//
	age=n;
	}
unsigned person::getage()const{//
	return age;}
int main(){
	person songzeyu;
	int i;
	cout<<"please input one unsigned number:"<<endl;
	cin>>i;
	songzeyu.setage(i);
	cout<<"song ze yu's age is "<<songzeyu.getage()<<"!"<<endl;
	return 0;
	}